Press lemon pepper evenly onto steaks. Place steaks on grid over medium, ash-covered coals. Grill, covered, 12 to 17 minutes (over medium heat on preheated gas grill, 12 to 16 minutes) for medium rare (145°F) to medium (160°F) doneness, turning occasionally.
Meanwhile, combine spinach, cheese and basil in large bowl. Drizzle with balsamic vinegar; toss to coat and set aside.
Remove steak from grill and let stand 5 minutes. Place naan on grill; grill, covered, 1 to 3 minutes or until lightly browned, turning once.
Carve steaks into slices. Top naan evenly with spinach mixture and steak slices.
Nutrition information per serving: 437 Calories; 135 kcal Calories from fat; 15 g Total Fat; 7 g Saturated Fat; 0 g Monounsaturated Fat; 92 mg Cholesterol; 467 mg Sodium; 37 g Total Carbohydrate; 4.6 g Dietary Fiber; 38 g Protein; 3.9 mg Iron; 7.7 mg Niacin; 0.6 mg Vitamin B6; 1.2 mcg Vitamin B12; 4.9 mg Zinc; 33.1 mcg Selenium; 99.9 mg Choline;